Octane and Towing

[dustinm]

I have been running 87 in my 6.2 (not towing with it) as the price for premium has escalated higher than diesel. With the lower octane I have managed a new MPG high score on the display (33.5 for last 25 miles, 29.5 last 50). When I go to tow again I will def fill up back up with 91. But whats to say we are getting 91 out of the hose? Esp when there is only 1 hose for three fuel grades. I know they dont dedicate a truck for each fuel either.

[69 Post Sedan]

Originally Posted by dustinm

I have been running 87 in my 6.2 (not towing with it) as the price for premium has escalated higher than diesel. With the lower octane I have managed a new MPG high score on the display (33.5 for last 25 miles, 29.5 last 50). When I go to tow again I will def fill up back up with 91. But whats to say we are getting 91 out of the hose? Esp when there is only 1 hose for three fuel grades. I know they dont dedicate a truck for each fuel either.

Is it possible that the engine timing is backed off with the lower octane and the result is better fuel mileage? Although power will be down in that scenario also.

On a side note, I’ve gotten 28.5 on a 25 mile average.

Kurt

[dustinm]

Originally Posted by 69 Post Sedan

Is it possible that the engine timing is backed off with the lower octane and the result is better fuel mileage? Although power will be down in that scenario also.

On a side note, I’ve gotten 28.5 on a 25 mile average.

Kurt

I think the load is light enough, that it isnt detonating and is able to keep the higher timing table.